能源化学(英文) ›› 2015, Vol. 21 ›› Issue (2): 157-170.DOI: 10.1016/S2095-4956(15)60296-0

• ARTICLES • 上一篇    下一篇

Enhanced electrochemical performance of Li-ion batteries with nanoporous titania as negative electrodes

Md. Arafat Rahmana, Xiaojian Wanga, Cuie Wena,b   

  1. a. Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia;
    b. School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University Bundoora, Victoria 3083, Australia
  • 收稿日期:2014-09-15 修回日期:2014-11-09 出版日期:2015-03-23 发布日期:2015-03-23
  • 通讯作者: Cuie Wen
  • 基金资助:

    This work was supported by the Australia-India Strategic Research Fund (AISRF, ST060048)

Enhanced electrochemical performance of Li-ion batteries with nanoporous titania as negative electrodes

Md. Arafat Rahmana, Xiaojian Wanga, Cuie Wena,b   

  1. a. Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia;
    b. School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University Bundoora, Victoria 3083, Australia
  • Received:2014-09-15 Revised:2014-11-09 Online:2015-03-23 Published:2015-03-23
  • Contact: Cuie Wen
  • Supported by:

    This work was supported by the Australia-India Strategic Research Fund (AISRF, ST060048)

摘要: Nanoporous anatase TiO2 (np-TiO2) electrodes have been developed via the anodization of titanium foils in fluoride containing electrolytes, and its application in rechargeable lithium-ion batteries (LIBs) was investigated. Four different types of np-TiO2 electrodes with different pore diameters of 14.7±8.2nm, 12.8±6.8nm, 11.0±5.5, and 26.7±13.6nm were fabricated for evaluating the effect of nanoporous characteristics on the LIB performance. The discharge capacity of the four battery types 1, 2, 3, and 4 were 132.7 mAh·g-1, 316.7 mAh·g-1, 154.3 mAh·g-1, and 228.4 mAh·g-1, respectively. In addition, these electrodes 1, 2, 3, and 4 exhibited reversible capacity of 106.9 mAh·g-1 after 295th, 180.9 mAh·g-1 after 220th, 126.1 mAh·g-1 after 150th, and 206.7 mAh·g-1 after 85th cycle at a rate of 1 C, respectively. It was noted that the cyclic life of the batteries had an inverse relationship, and the capacity had a proportional relationship to the pore diameter. The enhanced electrochemical performance of the nanoporous electrodes can be attributed to the improved conductivity and the enhanced kinetics of lithium insertion/extraction at electrode/electrolyte interfaces because of the large specific surface area of np-TiO2 electrodes.

关键词: nanoporous TiO2, negative electrode, capacity, lithium-ion batteries

Abstract: Nanoporous anatase TiO2 (np-TiO2) electrodes have been developed via the anodization of titanium foils in fluoride containing electrolytes, and its application in rechargeable lithium-ion batteries (LIBs) was investigated. Four different types of np-TiO2 electrodes with different pore diameters of 14.7±8.2nm, 12.8±6.8nm, 11.0±5.5, and 26.7±13.6nm were fabricated for evaluating the effect of nanoporous characteristics on the LIB performance. The discharge capacity of the four battery types 1, 2, 3, and 4 were 132.7 mAh·g-1, 316.7 mAh·g-1, 154.3 mAh·g-1, and 228.4 mAh·g-1, respectively. In addition, these electrodes 1, 2, 3, and 4 exhibited reversible capacity of 106.9 mAh·g-1 after 295th, 180.9 mAh·g-1 after 220th, 126.1 mAh·g-1 after 150th, and 206.7 mAh·g-1 after 85th cycle at a rate of 1 C, respectively. It was noted that the cyclic life of the batteries had an inverse relationship, and the capacity had a proportional relationship to the pore diameter. The enhanced electrochemical performance of the nanoporous electrodes can be attributed to the improved conductivity and the enhanced kinetics of lithium insertion/extraction at electrode/electrolyte interfaces because of the large specific surface area of np-TiO2 electrodes.

Key words: nanoporous TiO2, negative electrode, capacity, lithium-ion batteries